Modified downlink control information for supporting low-end user equipment

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive an indication of a modified physical downlink control channel (PDCCH) configuration for a low-end UE; receive downlink control information (DCI) configured according to the modified PDCCH configuration; and process the DCI according to the modified PDCCH configuration. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 959,075, filed on January 9, 2020, entitled “MODIFIED DOWNLINK CONTROLINFORMATION TO SUPPORT LOW TIER USER EQUIPMENT,” and U.S. Non-Provisional Patent Application No. 17 / 143,528, filed on January 7, 2021, entitled “MODIFIED DOWNLINK CONTROL INFORMATION TO SUPPORT LOW TIER USER EQUIPMENT,” which are hereby expressly incorporated herein by reference.

[0003] Public domain

[0004] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for supporting modified downlink control information for low-end user equipment.

[0005] background

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0007] A wireless communication network may include several base stations (BS) that can support communication of several user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from a BS to a UE, while uplinks (or reverse links) refer to the communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receive Point (TRP), a New Radio (NR) BS, a 5G Node B, and the like.

[0008] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different user equipment to communicate at city, country, region, and even global levels. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that adopt these technologies.

[0009] Overview

[0010] In some aspects, a wireless communication method performed by a user equipment (UE) may include: receiving an indication of a modified physical downlink control channel (PDCCH) configuration for a low-end UE; receiving downlink control information (DCI) configured according to the modified PDCCH configuration; and processing the DCI according to the modified PDCCH configuration.

[0011]

[0011] In some aspects, a method of wireless communication performed by a base station may include transmitting an indication of a modified PDCCH configuration for a low-end user equipment (UE); and transmitting a DCI configured according to the modified PDCCH configuration.

[0012] In some aspects, a UE for wireless communication may include a memory and one or more processors coupled to the memory. For example, the one or more processors may be coupled to the memory operatively, electronically, communicatively, or otherwise. The memory may include instructions executable by the one or more processors to cause the UE to: receive an indication of a modified PDCCH configuration for a low-end UE; receive a DCI configured according to the modified PDCCH configuration; and process the DCI according to the modified PDCCH configuration.

[0013] In some aspects, a base station for wireless communication may include a memory and one or more processors coupled to the memory. For example, the one or more processors may be coupled to the memory operatively, electronically, communicatively, or otherwise. The memory may include instructions executable by the one or more processors to cause the base station to: transmit an indication of a modified PDCCH configuration for a low-end UE; and transmit a DCI configured according to the modified PDCCH configuration.

[0014] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the UE to: receive an indication of a modified PDCCH configuration for a low-end UE; receive a DCI configured according to the modified PDCCH configuration; and process the DCI according to the modified PDCCH configuration.

[0015] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the base station to: transmit an indication of a modified PDCCH configuration for a low-end UE; and transmit a DCI configured according to the modified PDCCH configuration.

[0016] In some aspects, an apparatus for wireless communications may include: means for receiving an indication of a modified PDCCH configuration for low-end equipment; means for receiving DCI configured according to the modified PDCCH configuration; and means for processing the DCI according to the modified PDCCH configuration.

[0017]

[0011] In some aspects, an apparatus for wireless communications may include means for transmitting an indication of a modified PDCCH configuration for a low-end UE; and means for transmitting a DCI configured according to the modified PDCCH configuration.

[0018] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and as illustrated in the accompanying figures and specification.

[0019] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0022] Figure 1 is a diagram illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0023] Figure 2 is a diagram illustrating an example of a base station and a UE in communication in a wireless communication network according to various aspects of the present disclosure.

[0024] Figure 3-9 is a diagram illustrating an example of modified downlink control information for supporting low-end user equipment in accordance with various aspects of the present disclosure.

[0025] Fig.10 is a diagram illustrating an example process, performed, for example, by user equipment, in accordance with various aspects of the present disclosure.

[0026] Fig.11 is a diagram illustrating example processes performed, for example, by a base station in accordance with various aspects of the present disclosure.

[0027] Detailed Description

[0028] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0029] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0030] It should be noted that although various aspects may be described herein using terminology typically associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, such as 5G and later generations, including NR technologies.

[0031] Figure 1 1 is a diagram illustrating a wireless network 100 in which various aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include several BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, B node, gNB, 5G B node (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0032] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0033] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces, such as direct physical connections, virtual networks, and / or the like using any suitable transport network.

[0034] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0035] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0036] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0037] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0038] Some UEs may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as a processor component, a memory component, and the like.

[0039] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0040] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0041] In some aspects, the base station 110 may serve different UEs 120 of different categories, different UEs 120 supporting different capabilities, etc. For example, the base station 110 may serve a first UE 120f having less advanced capabilities (e.g., lower capabilities, reduced capabilities, etc.) and a second UE 120g having higher capabilities (e.g., higher capabilities). For example, the first UE 120f may be a UE 120 of the first category (e.g., NR-lightweight UE), and the second UE 120g may be a UE 120 of the second category (e.g., NR UE, legacy UE, etc.). Additionally or alternatively, the first UE 120f may have a reduced feature set compared to the second UE 120g. In some aspects, the first UE 120f may include an MTC UE, as well as an eMTC UE, an IoT UE, etc., as described above.

[0042] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described in Figure 1 Examples described.

[0043] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which may be Figure 1One for each base station and one for each UE in the base station 110. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1.

[0044] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, position coding may be used to generate synchronization signals to convey additional information.

[0045] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0046] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 as well as other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and provide decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0047] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component(s) of the base station 110 may perform one or more techniques associated with modified downlink control information for supporting low-end user equipment, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Fig.10 The process of 1000 Fig.11 1100, and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions, when executed by one or more processors of base station 110 and / or UE 120, may perform or direct, for example, Fig.10 The process of 1000 Fig.11 The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0048] In some aspects, UE 120 may include means for receiving an indication of a modified PDCCH configuration for low-end UEs; means for receiving DCI configured according to the modified PDCCH configuration; means for processing the DCI according to the modified PDCCH configuration; and the like. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0049] In some aspects, base station 110 may include means for transmitting an indication of a modified PDCCH configuration for low-end UEs; means for transmitting DCI configured according to the modified PDCCH configuration; etc. In some aspects, such means may include in conjunction with Figure 2 One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0050] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described in Figure 2 Examples described.

[0051] Figure 3 is a diagram illustrating an example 300 of modified downlink control information for supporting low-end user equipment in accordance with various aspects of the present disclosure.

[0052] The base station 110 may transmit downlink control information (DCI) on a physical downlink control channel (PDCCH) to indicate control information to the UE 120, such as scheduling information for downlink communication, scheduling information for uplink communication, slot format indication, preemption indication, power control information, etc. Different DCI formats may be used for different purposes, such as scheduling physical uplink shared channel (PUSCH) communication (e.g., using DCI format 0_0 or DCI format 0_1), scheduling physical downlink shared channel (PDSCH) communication (e.g., using DCI format 1_0 or DCI format 1_1), indicating a slot format (e.g., using DCI format 2_0), indicating preemption (e.g., using DCI format 2_1), indicating a transmit power control (TPC) command (e.g., using DCI format 2_2 or DCI format 2_3), etc.

[0053] Because UE 120 performs blind decoding to obtain DCI, different DCI formats may have the same payload size (e.g., may be byte-aligned) within the bandwidth portion to reduce the complexity of blind decoding. The number and / or type of DCI fields included in the payload of the DCI may depend on the DCI format, the search space (SS) set configuration, the radio network temporary identifier (RNTI) associated with the DCI (e.g., used for scrambling and descrambling the DCI), etc.

[0054] As above combined Figure 1 As described, in some aspects, the base station 110 may serve different UEs 120 of different categories, different UEs 120 supporting different capabilities, etc. For example, the base station 110 may serve a first category of UEs (e.g., low-end UEs, such as those described in reference to FIG. 1 ) having less advanced capabilities (e.g., lower capabilities, reduced capabilities, etc.). Figure 1 120f) and a second category of UEs with higher capabilities (eg, higher capabilities) (eg, high-end UEs or advanced UEs, such as reference Figure 1 In this case, the UEs of the first category may have a reduced feature set compared to the UEs of the second category.

[0055] For example, the first category of UEs may support a lower maximum modulation and coding scheme (MCS) than the second category of UEs (e.g., quadrature phase shift keying (QPSK) compared to 256 quadrature amplitude modulation (QAM), etc.), may support lower transmit power than the second category of UEs, may have less advanced beamforming capabilities than the second category of UEs, may be able to communicate over a narrower maximum bandwidth portion than the second category of UEs, may have fewer antennas (e.g., transmit antennas and / or receive antennas) and / or antenna ports than the second category of UEs, may not be able to perform full-duplex communications (e.g., for frequency division duplexing (FDD)), may have a lower power class than the second category of UEs, may have a relaxed UE processing timeline or capability compared to the second category of UEs (e.g., may not be able to process communications as quickly as the second category of UEs), etc.

[0056] In some cases, low-end UEs may not need or may not be able to use all of the information included in a DCI designed for high-end UEs (sometimes referred to as legacy DCI). As a result, using legacy DCI for low-end UEs may result in unnecessary decoding complexity, which may increase latency and power consumption (thereby shortening battery life). Some techniques and apparatus described herein enable support for multiple categories of UEs by modifying various physical layer procedures for PDCCH (e.g., for DCI). These modifications may enable coexistence between UEs with different capabilities, may provide enhanced coverage for low-end UEs (e.g., to achieve the same or similar downlink coverage across different UE categories for a particular base station transmit power), and the like.

[0057] In some examples, a base station may communicate with a NB-IoT UE using DCI with a reduced payload size (e.g., compared to a non-NB-IoT UE). However, the NB-IoT UE is assigned a dedicated bandwidth (e.g., one resource block) that is not shared with other types of UEs (e.g., non-NB-IoT UEs). Therefore, in the NB-IoT operating mode, the UE does not need to use blind decoding to distinguish between DCI formats or sizes targeted at different types of UE capabilities, because all DCI transmitted in the NB-IoT band is intended for NB-IoT UEs. In other words, in the NB-IoT band, there are no coexistence issues between NB-IoT UEs and non-NB-IoT UEs. Therefore, in NB-IoT, there is no modified PDCCH configuration as described herein (e.g., because the NB-IoT configuration is specified in the 3GPP standard to reduce signaling overhead).

[0058] Figure 3An overview of example modifications that may be made to the PDCCH procedure to support various classes of UEs is provided. When processing DCI for transmission, base station 110 may use Figure 3 One or more modifications shown in .

[0059] like Figure 3 As shown in , the base station 110 can construct the DCI payload at box 305. In some aspects, the base station 110 can reduce the size of the DCI payload for low-end UEs compared to the legacy DCI for high-end UEs. Depending on the size of the DCI payload, the base station 110 can perform bit padding at box 310. Bit padding can be performed to achieve byte alignment across different DCI formats, thereby reducing the complexity of blind decoding. In some cases, when the DCI field completely fills the last byte of the DCI payload (for example, filling all 8 bits of the last byte), the base station 110 does not need to perform bit padding. Additional details are provided below in conjunction with Figure 4-6 to describe.

[0060] The base station 110 may perform DCI payload interleaving at block 315. In some aspects, the base station 110 may use a different interleaver and / or a different interleaving pattern for the DCI for low-end UEs as compared to the legacy DCI for high-end UEs. In some aspects, the interleaving for low-end UEs may map higher priority bits (e.g., bits that are used or more important to the low-end UEs) to locations with higher reliability (e.g., channels, sub-blocks of OFDM symbols, etc.), and may map lower priority bits (e.g., bits that are unused or less important to the low-end UEs) to locations with lower reliability. Additional details are provided below in conjunction with Figure 4 and 7 to describe.

[0061] The base station 110 may perform DCI payload scrambling at block 320 (e.g., before cyclic redundancy check (CRC) appending). In some aspects, the base station 110 may use different scrambling identifiers to indicate different control information when scrambling the DCI payload. In some aspects, the control information indicated by the scrambling identifier used to scramble the DCI payload may be excluded from the DCI payload to reduce the DCI payload size. Additional details are provided below in conjunction with Figure 4 and 9 to describe.

[0062] The base station 110 may perform CRC appending at block 325 and may perform RNTI masking at block 330. In some aspects, the base station 110 may mask the DCI for the low-end UEs using an RNTI having a different length (e.g., a longer length) than the length of the RNTI used to mask the legacy DCI for the high-end UEs. Additional details are provided below in conjunction with Figure 4 and 8 to describe.

[0063] The base station 110 may perform CRC interleaving at block 335, may perform channel decoding at block 340, may perform rate matching at block 345, and may perform additional DCI scrambling (e.g., of the DCI payload plus the CRC bits) at block 350. As described above, the base station 110 may use different scrambling identifiers to indicate different control information when scrambling the combination of the DCI payload and the CRC bits. In some aspects, the control information indicated by the scrambling identifier used to scramble the DCI payload and the CRC bits may be excluded from the DCI payload to reduce the DCI payload size. Additional details are provided below in conjunction with Figure 4 and 9 to describe.

[0064] The base station 110 may perform modulation at block 355. In some aspects, the base station 110 may modulate the DCI for the low-end UEs using a different modulation scheme and / or a different modulation and coding scheme (MCS) (e.g., a lower MCS such as binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK), etc.) as compared to the modulation scheme and / or MCS used to modulate the legacy DCI for the high-end UEs.

[0065] The base station 110 may perform resource element (RE) mapping at box 360. In some aspects, the base station 110 may map REs to different CORESETs and / or different SSs (e.g., with greater monitoring periodicity, etc.) for DCI for low-end UEs compared to legacy DCI for high-end UEs. As shown in the figure, RE mapping may be performed for the DCI and for the DMRS associated with the DCI generated at box 365, and the DMRS may be multiplexed with the DCI. In some aspects, the base station 110 may use different scrambling identifiers to indicate different control information when scrambling the DMRS associated with the DCI. In some aspects, the control information indicated by the scrambling identifier used to scramble the DMRS may be excluded from the DCI payload to reduce the DCI payload size. Additional details are provided below in conjunction with Figure 4 and 9 to describe.

[0066] The base station 110 may perform precoding at block 370 and may perform radio frequency (RF) transmission operations at block 375. In some aspects, the base station 110 may use different transmit power for DCI for low-end UEs than for legacy DCI for high-end UEs (e.g., by applying different transmit power boosting).

[0067] By applying one or more of the above techniques or operations, base station 110 can support multiple categories of UEs. These modifications can enable coexistence between UEs with different capabilities, provide enhanced coverage for low-end UEs, reduce waiting time, save UE resources (e.g., processing resources, memory resources, or battery power, etc.), etc.

[0068] As indicated above, Figure 3 are provided as examples. Other examples may differ from those described herein. Figure 3 Examples described.

[0069] Figure 4 is a diagram illustrating an example 400 of modified downlink control information for supporting low-end user equipment in accordance with various aspects of the present disclosure. Figure 4 As shown, base station 110 and UE 120 may communicate with each other.

[0070] As indicated by reference numeral 405, base station 110 may transmit an indication of a modified PDCCH configuration (sometimes referred to as an enhanced PDCCH) to UE 120. In some aspects, the modified PDCCH configuration may be designed for low-end UEs. Additionally or alternatively, the modified PDCCH configuration may be different from the PDCCH configuration used for legacy DCI (e.g., for high-end UEs). As shown, the indication of the modified PDCCH configuration may be included in system information (SI) (e.g., one or more system information blocks (SIBs)), radio resource control (RRC) messages (e.g., RRC configuration messages or RRC reconfiguration messages, etc.), etc. As indicated by reference numeral 410, UE 120 may receive the modified PDCCH configuration (e.g., by acquiring and / or decoding the SI and / or RRC message including the modified PDCCH configuration).

[0071] Although some techniques are described herein in conjunction with modified PDCCH configurations designed for and / or used with low-end UEs, in some aspects, the modified PDCCH configurations may be used and / or utilized by high-end UEs, such as high-end UEs that require enhanced coverage (e.g., located near a cell edge, measuring an RSRP parameter less than or equal to a threshold, etc.), high-end UEs that are in power saving mode, etc.

[0072] In some aspects, the indication of a modified PDCCH configuration may include an indication of whether to monitor legacy DCI or whether to monitor DCI with a reduced payload size compared to the legacy DCI. For example, the indication may include a bit set (e.g., one or more bits). In some aspects, the bits in the bit set may be set to a first value (e.g., 0) to indicate that the legacy DCI is to be monitored, and may be set to a second value (e.g., 1) to indicate that the DCI with a reduced payload size (compared to the legacy DCI) is to be monitored. Additionally or alternatively, the indication of a modified PDCCH configuration for low-end UEs may include an indication of a DCI format for the DCI with a reduced payload size. For example, one or more bits in the bit set may indicate a DCI format for the DCI with a reduced payload size. The following in conjunction with Figure 5 and Figure 6 Additional details regarding different DCI payload sizes and different DCI formats are described.

[0073] In some aspects, the indication of the modified PDCCH configuration may include an indication of whether to use a first deinterleaving mode associated with the legacy DCI or a second deinterleaving mode associated with the DCI (wherein one or more low priority bits of the DCI are mapped to one or more lower reliability positions compared to one or more high priority bits of the DCI). Additionally or alternatively, the indication of the modified PDCCH configuration may include an indication of whether to use a first frozen bit repetition mode associated with the legacy DCI or a second frozen bit repetition mode associated with the DCI (wherein one or more low priority bits of the DCI are mapped to one or more lower reliability positions compared to one or more high priority bits of the DCI). For example, the indication may include a bit set (e.g., one or more bits). In some aspects, the bits in the bit set may be set to a first value (e.g., 0) to indicate that the first deinterleaving mode is to be used, and may be set to a second value (e.g., 1) to indicate that the second deinterleaving mode is to be used. Additionally or alternatively, the bits in the bit set may be set to a first value (e.g., 0) to indicate that a first frozen bit repetition pattern is to be used, and may be set to a second value (e.g., 1) to indicate that a second frozen bit repetition pattern is to be used. Figure 7 Additional details regarding different deinterleaving modes and different frozen bit repetition patterns are described.

[0074] In some aspects, the indication of the modified PDCCH configuration includes an indication of whether to use an RNTI having a first bit length (e.g., a shorter bit length, such as 16 bits) to decode the DCI or an RNTI having a second bit length (e.g., a longer bit length, such as greater than 16 bits) to decode the DCI. For example, the indication may include a set of bits (e.g., one or more bits). In some aspects, the bits in the set of bits may be set to a first value (e.g., 0) to indicate that an RNTI having a first bit length is to be used, and may be set to a second value (e.g., 1) to indicate that an RNTI having a first bit length is to be used. Additionally or alternatively, the bits in the set of bits may indicate a second bit length (e.g., by indicating an integer value that is added to the first bit length to calculate the second bit length). The following is combined with Figure 8 Additional details regarding different RNTI lengths are described.

[0075] In some aspects, the indication of a modified PDCCH configuration may include an indication of whether to test multiple scrambling identifiers when processing the DCI and / or when processing a demodulation reference signal associated with the DCI. For example, the indication may include a set of bits (e.g., one or more bits). In some aspects, the bits in the set of bits may be set to a first value (e.g., 0) to indicate that multiple scrambling identifiers are not to be tested, and may be set to a second value (e.g., 1) to indicate that multiple scrambling identifiers are to be tested. Additionally or alternatively, the indication of a modified PDCCH configuration may include an indication of whether to use a linear scrambling scheme for the DCI and / or a DMRS associated with the DCI (e.g., based at least in part on a bit being set to a first value, such as 0) or a non-linear scrambling scheme for the DCI and / or a DMRS associated with the DCI (e.g., based at least in part on a bit being set to a second value, such as 1). The following is in conjunction with Fig. 9 Additional details regarding testing multiple scrambling identifiers and using linear or non-linear scrambling schemes are described.

[0076] In some aspects, the indication of the modified PDCCH configuration may include multiple indications described elsewhere herein (e.g., above). For example, the indication of the modified PDCCH configuration may include a bitmap (e.g., a set of bits, as described above). Different bits or groups of bits in the bitmap may correspond to the above different indications.

[0077] As indicated by reference numeral 415, base station 110 may transmit a modified PDCCH communication (e.g., DCI) to UE 120. The modified PDCCH communication may be transmitted and / or configured according to a modified PDCCH configuration indicated by base station 110. For example, base station 110 may perform the above combined Figure 3One or more operations described herein may be performed to generate and / or transmit a modified PDCCH communication according to the modified PDCCH configuration. For example, the base station 110 may use the payload size, interleaving pattern, frozen bit repetition pattern, RNTI length, scrambling identifier, and / or scrambling scheme indicated by the modified PDCCH configuration.

[0078] As indicated by reference numeral 420, the UE 120 may process the modified PDCCH communication (e.g., DCI) according to the modified PDCCH configuration. Such processing may include, for example, PDCCH monitoring, blind decoding, payload interpretation, deinterleaving, decoding, RNTI demasking, descrambling, etc. For example, the UE 120 may use the payload size, deinterleaving mode, frozen bit repetition mode, RNTI length, descrambling identifier, and / or descrambling scheme indicated by the modified PDCCH configuration.

[0079] As indicated by reference numeral 425, the base station 110 and the UE 120 may communicate based at least in part on the contents of the DCI payload. For example, the DCI may schedule PDSCH communications or downlink reference signals (RS), and the base station 110 may transmit the PDSCH communications or downlink RS to the UE 120. Additionally or alternatively, the DCI may schedule PUSCH communications, physical uplink control channel (PUCCH) communications, or uplink RS, and the UE 120 may transmit the PUSCH communications, PUCCH communications, or uplink RS to the base station 110.

[0080] Base station 110 may enable support for multiple categories of UEs by indicating to UE 120 whether to use a modified PDCCH configuration (or a legacy PDCCH configuration). These modifications may enable coexistence between UEs with different capabilities, may provide enhanced coverage for low-end UEs, may reduce latency, may save UE resources (e.g., processing resources, memory resources, or battery power, etc.), and so on.

[0081] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described herein. Figure 4 Examples described.

[0082] Figure 5 is a diagram illustrating an example 500 of modified downlink control information for supporting low-end user equipment according to various aspects of the present disclosure. Figure 4As described, in some aspects, the indication of the modified PDCCH configuration includes an indication of whether to monitor for legacy DCI 505 or whether to monitor for DCI 510 having a reduced payload size compared to the legacy DCI (sometimes referred to as reduced payload DCI 510). Additionally or alternatively, the indication of the modified PDCCH configuration may include an indication of a DCI format for the reduced payload DCI 510. The DCI format may indicate DCI fields included in a DCI having the DCI format, an arrangement or order of the DCI fields, a number of bits included in each DCI field, etc.

[0083] In example 500, the legacy DCI 505 has DCI format 1_0 and is CRC-scrambled using a cell RNTI (C-RNTI). The reduced payload DCI 510 in example 500 may correspond to the legacy DCI 505 in example 500, which means that the reduced payload DCI 510 may have a DCI format corresponding to DCI format 1_0 (such as DCI format X_0, where X is equal to, for example, 3 or 4), may be used for the same purpose as the legacy DCI 505 (e.g., to schedule PDSCH communications), and / or may use the same RNTI as the legacy DCI 505 (e.g., C-RNTI in example 500) to scramble the CRC. Figure 5 The DCI type shown in FIG. 1 (e.g., DCI format 1_0 using C-RNTI scrambling) is shown as an example, and the techniques described herein may be applied to other types of DCI (e.g., with different DCI formats or RNTI scrambling), which may include Figure 5 The DCI fields shown in FIG. 5 may include additional DCI fields, fewer DCI fields, different DCI fields, or a different arrangement of DCI fields.

[0084] In some aspects, the reduced payload DCI may exclude one or more fields included in the corresponding legacy DCI. For example, a reserved bit field included in the legacy DCI may be excluded from the corresponding reduced payload DCI (e.g., for DCI format 1_0). Additionally or alternatively, a legacy DCI field indicating one or more parameters of a second transport block (TB) for multi-TB communication (e.g., a field indicating an MCS, a new data indicator (NDI), and / or a redundancy value (RV) for transport block 2) may be excluded from the corresponding reduced payload DCI (e.g., in DCI format 1_1). Additionally or alternatively, several DCI fields that include a slot format indicator in the legacy DCI (e.g., in DCI format 2_0) may be subtracted from the corresponding reduced payload DCI. For example, the reduced payload DCI may include fewer fields to indicate a slot format indicator than the corresponding legacy DCI.

[0085] Additionally or alternatively, the reduced payload DCI may exclude one or more bits of one or more DCI fields included in the legacy DCI. For example, the number of bits of the reduced payload DCI in a particular DCI field may be less than the number of bits included in the legacy DCI for the particular DCI field. For example, a frequency domain resource assignment (FDRA) field, a time domain resource assignment (TDRA) field, an MCS field, a hybrid automatic repeat request (HARQ) process number field, a downlink assignment index (DAI) index, a reserved bit field, or a bit filling field, etc. in the legacy DCI may have a reduced size (e.g., fewer bits) in the corresponding reduced payload DCI. In example 500, the FDRA field, the TDRA field, the MCS field, the HARQ process number field, and the DAI field include fewer bits in the reduced payload DCI 510 compared to the corresponding legacy DCI 505.

[0086] By providing modified DCIs with reduced payload sizes compared to legacy DCIs, UE resources may be preserved due to less complex decoding, coverage may be enhanced due to less likelihood of decoding failures, latency may be reduced, and so on.

[0087] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described herein. Figure 5 Examples described.

[0088] Figure 6 is a diagram illustrating an example 600 of modified downlink control information for supporting low-end user equipment in accordance with various aspects of the present disclosure.

[0089] Figure 6An example of reducing the size of the MCS field in the DCI is shown, as shown above in conjunction with Figure 5 In some aspects, the legacy DCI may include 5 bits for the MCS field, such as to indicate one of 32 possible MCS index values. In some aspects, the corresponding reduced payload DCI may include 4 bits for the MCS field, such as to indicate one of 16 possible MCS index values, which may be selected from (e.g., may be a subset of) the 32 possible MCS index values ​​of the legacy DCI.

[0090] Alternatively, the length of the MCS field in the reduced payload DCI may be 5 bits, but the most significant bit (MSB) may be mapped to a lower reliability position during interleaving, and the 4 least significant bits (LSBs) may be mapped to a higher reliability position (e.g., than the MSB) during interleaving. Figure 7 Additional details of interleaving are described.

[0091] As indicated above, Figure 6 are provided as examples. Other examples may differ from those described herein. Figure 6 Examples described.

[0092] Figure 7 is a diagram illustrating an example 700 of modified downlink control information for supporting low-end user equipment according to various aspects of the present disclosure. Figure 4 In some aspects, the indication of the modified PDCCH configuration may include an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with a legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with a non-legacy DCI (wherein one or more low priority bits of the non-legacy DCI are mapped to one or more lower reliability positions compared to one or more high priority bits of the non-legacy DCI).

[0093] As indicated by reference numeral 705, DCI fields and / or bits of DCI fields may be classified as having different priorities. The classification may depend on, for example, the type of DCI field, whether a bit is used or unused, whether UE 120 may use information other than DCI (e.g., using RNTI or SS set configuration, etc.) to determine the bit value, etc. As indicated by reference numeral 710, at base station 110, higher priority DCI fields and / or DCI bits may be mapped to higher reliability locations (e.g., channels or sub-blocks of OFDM symbols, etc.) using interleaving (e.g., polarity decoding). As indicated by reference numeral 715, at base station 110, lower priority DCI fields and / or DCI bits may be mapped to lower reliability locations using interleaving (e.g., polarity decoding). Lower priority bits may include reserved bits, padding bits, unused bits, bits implicitly mapped to RNTI or SS set configuration, etc.

[0094] When the base station 110 indicates the deinterleaving mode and / or the frozen bit mode to the UE 120 (e.g., in an RRC message), the UE 120 may use one or both of these modes to properly deinterleave and / or decode the DCI. This may improve the reliability of the more important DCI content. As shown by reference numeral 720, in some aspects, the deinterleaving mode and / or the frozen bit mode may depend on (e.g., may be specific to) the DCI format, the DCI payload size, the RNTI used to scramble or mask the DCI, etc. Therefore, different deinterleaving modes may be used for different combinations of DCI formats, DCI payload sizes, RNTIs, etc. (e.g., to account for differences in fields included in different types of DCI and / or the priorities of those fields). In some aspects, the base station 110 may (e.g., in an RRC message) configure a lookup table (LUT) for the deinterleaving mode and / or the frozen bit mode for the UE 120. Different LUTs may correspond to different combinations of DCI formats, DCI payload sizes, and / or RNTIs.

[0095] In some aspects, base station 110 may indicate one or more values ​​corresponding to one or more low priority bits of the DCI to UE 120 in signaling other than the DCI (such as in system information, an RRC message, etc.). Additionally or alternatively, UE 120 may determine one or more values ​​corresponding to one or more low priority bits of the DCI based at least in part on an RNTI associated with UE 120 (e.g., an RNTI used to descramble the DCI, etc.), an SS set configuration (e.g., for the DCI), etc.

[0096] As indicated above, Figure 7 are provided as examples. Other examples may differ from those described herein. Figure 7 Examples described.

[0097] Figure 8 8 is a diagram illustrating an example 800 of modified downlink control information for supporting low-end user equipment according to various aspects of the present disclosure. Figure 4 In some aspects, the indication of the modified PDCCH configuration may include an indication of whether to use an RNTI having a first bit length (e.g., a shorter bit length) to decode the DCI or an RNTI having a second bit length (e.g., a longer bit length) to decode the DCI. In some aspects, the first bit length is 16 bits (e.g., for legacy DCI) and the second bit length is greater than 16 bits (e.g., for non-legacy DCI).

[0098] As shown by reference numeral 805, in some aspects, the indication of the modified PDCCH configuration may include an indication of a second bit length. For example, the indication of the modified PDCCH configuration may indicate an integer value (e.g., ΔS), and the second bit length may be greater than the first bit length by the integer value. In this case, the UE 120 may calculate the second bit length as the first bit length (e.g., which may be fixed to 16 bits) plus the integer value indicated in the modified PDCCH configuration. Additionally or alternatively, the indication of the second bit length (e.g., integer value) may be included in system information, RRC messages, etc. (e.g., in some aspects, separate from the modified PDCCH configuration). In some aspects, the RNTI with the second bit length may be used in a UE-specific search space (USS) (sometimes referred to as a UE search space), a common search space (CSS), or both the USS and the CSS. Additionally or alternatively, the RNTI with the second bit length may be used for a specific DCI format, a specific set or subset of DCI formats, or for all DCI formats.

[0099] By increasing the number of bits used for RNTI, a wireless communication system may be able to support a larger number of UEs and / or a larger number of UEs with different capabilities (eg, within overlapping uplink and / or downlink bandwidth portions) with a reduced likelihood of RNTI mask collisions.

[0100] When transmitting DCI (e.g., group common (GC) DCI and / or non-GC DCI), the base station 110 may determine whether to use an RNTI having a first bit length or an RNTI having a second bit length to scramble (e.g., mask) the DCI based at least in part on whether the DCI is intended for a first category of UEs (e.g., low-end UEs) (e.g., contains information for the first category of UEs, is to be transmitted to the first category of UEs, etc.), a second category of UEs (e.g., high-end UEs or advanced UEs), or both. For example, if the DCI is intended only for the first category of UEs and not for the second category of UEs, the base station 110 may use an RNTI having a second (e.g., longer) bit length. In this case, at least one of the additional bits (e.g., a ΔS bit, an MSB beyond the 16th bit, etc.) may be set to 1. As another example, if the DCI is intended only for the second category of UEs and not for the first category of UEs, or if the DCI is intended for both the first category of UEs and the second category of UEs, the base station 110 may use an RNTI having a first (e.g., shorter) bit length. In this case, all additional bits (eg, ΔS bits, MSBs beyond the 16th bit, etc.) may be set to 0. In this manner, base station 110 may enable coexistence between the first category of UEs and the second category of UEs.

[0101] As indicated above, Figure 8 are provided as examples. Other examples may differ from those described herein. Figure 8 Examples described.

[0102] Fig. 9 is a diagram illustrating an example 900 of modified downlink control information for supporting low-end user equipment according to various aspects of the present disclosure. Figure 4 As described, in some aspects, the indication of a modified PDCCH configuration may include an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI, as shown by reference numeral 905 .

[0103] When multiple scrambling identifier tests are enabled, if the CRC of the DCI succeeds (e.g., passes) using a first scrambling identifier, the first scrambling identifier may indicate a first value (e.g., 0) of a bit that is excluded from the DCI. Similarly, if the CRC of the DCI succeeds using a second scrambling identifier, the second scrambling identifier may indicate a second value (e.g., 1) of the bit. Additionally or alternatively, the first scrambling identifier may indicate a first value of a DCI field that is excluded from the DCI, and the second scrambling identifier may indicate a second value of the DCI field. For example, the scrambling identifier may indicate the value of a VRB to PRB mapping field, an NDI field, an RV field, a DAI field, a TB scaling field, a normal uplink (NUL) carrier, and / or a supplemental uplink (SUL) carrier field, etc. In some aspects, the scrambling identifier may be selected prior to channel decoding (e.g., before Figure 3 ) and / or after channel decoding (e.g., in block 320 of Figure 3 scrambling using the scrambling identifier is performed in box 350 of .

[0104] By using a scrambling identifier to indicate one or more bits of a DCI, those one or more bits can be excluded from the DCI, thereby reducing decoding complexity and signaling overhead. In some aspects, multiple scrambling identifier tests can be enabled and / or used to reduce the number of bytes and / or the number of padding bits included in the DCI.

[0105] Additionally or alternatively, the indication of the modified PDCCH configuration may include an indication of whether a linear scrambling scheme is to be used for the DCI and / or a DMRS associated with the DCI or a non-linear scrambling scheme is to be used for the DCI and / or the DMRS associated with the DCI, as also indicated by reference numeral 905. For example, a non-linear scrambling scheme may be used for the DCI and / or DMRS to improve inter-cell interference mitigation for channel estimation and / or DCI detection.

[0106] As indicated above, Fig. 9 are provided as examples. Other examples may differ from those described herein. Fig. 9 Examples described.

[0107] Fig.10 is a diagram illustrating an example process 1000, performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 1000 is an example in which a UE (eg, UE 120, etc.) performs operations associated with supporting modified downlink control information for low-end user equipment.

[0108] like Fig.10As shown in , in some aspects, process 1000 may include receiving an indication of a modified PDCCH configuration for a low-end UE (block 1010). For example, the UE (e.g., using receive processor 258, controller / processor 280, memory 282, etc.) may receive an indication of a modified PDCCH configuration for a low-end UE, as described above.

[0109] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include receiving DCI configured according to a modified PDCCH configuration (block 1020). For example, the UE may receive (e.g., using receive processor 258, controller / processor 280, memory 282, etc.) DCI configured according to a modified PDCCH configuration, as described above.

[0110] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include processing the DCI according to the modified PDCCH configuration (block 1030). For example, the UE may process the DCI according to the modified PDCCH configuration (e.g., using receive processor 258, controller / processor 280, memory 282, etc.), as described above.

[0111] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0112] In a first aspect, an indication of a modified PDCCH configuration for low-end UEs is included in system information, a radio resource control message, or a combination thereof.

[0113] In a second aspect, alone or in combination with the first aspect, the indication of a modified PDCCH configuration for low-end UEs comprises an indication of whether to monitor legacy DCI or whether to monitor DCI having a reduced payload size compared to the legacy DCI.

[0114] In a third aspect, alone or in combination with one or more of the first and second aspects, the indication of a modified PDCCH configuration for low-end UEs comprises an indication of a DCI format of the DCI having a reduced payload size.

[0115] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, a DCI with a reduced payload size excludes one or more DCI fields included in a legacy DCI, one or more bits of one or more DCI fields included in a legacy DCI, or a combination thereof.

[0116] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, an indication of a modified PDCCH configuration for a low-end UE includes an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with a legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with the DCI (wherein one or more low priority bits of the DCI are mapped to one or more lower reliability locations compared to one or more high priority bits of the DCI).

[0117] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the second deinterleaving pattern or the second frozen bit repetition pattern is specific to at least one of a DCI format, a DCI payload size, or a radio network temporary identifier associated with the DCI.

[0118] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, the one or more low priority bits include at least one of reserved bits, padding bits, unused bits, bits mapped to a radio network temporary identifier, bits mapped to a search space set configuration, or a combination thereof.

[0119] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, a second deinterleaving pattern or a second frozen bit repetition pattern is indicated in a radio resource control message.

[0120] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, one or more values ​​corresponding to the one or more low priority bits are indicated in a system information or radio resource control message.

[0121] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, one or more values ​​corresponding to the one or more low priority bits are determined based at least in part on a radio network temporary identifier, a search space set configuration, or a combination thereof.

[0122] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, an indication of a modified PDCCH configuration for a low-end UE includes an indication of whether to use a radio network temporary identifier (RNTI) having a first bit length to decode the DCI or to use an RNTI having a second bit length to decode the DCI, the first bit length being shorter than the second bit length.

[0123] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the first bit length is 16 bits and the second bit length is greater than 16 bits.

[0124] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the indication of a modified PDCCH configuration for low-end UEs comprises an indication of a second bit length.

[0125] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the indication of a modified PDCCH configuration for low-end UEs includes an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI.

[0126] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, if a cyclic redundancy check on the DCI using the first scrambling identifier is successful, the first scrambling identifier indicates a first value of a bit excluded from the DCI, and if a cyclic redundancy check on the DCI using the second scrambling identifier is successful, the second scrambling identifier indicates a second value of the bit.

[0127] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the indication of a modified PDCCH configuration for a low-end UE includes an indication of whether to use a linear scrambling scheme for the DCI or a demodulation reference signal (DMRS) associated with the DCI or to use a non-linear scrambling scheme for the DCI or the DMRS associated with the DCI.

[0128] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the UE is a low-end UE or a high-end UE utilizing a modified PDCCH configuration.

[0129] although Fig.10 An example block diagram of process 1000 is shown, but in some aspects, process 1000 may include Fig.10 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1000. Additionally or alternatively, two or more blocks of the process 1000 may be executed in parallel.

[0130] Fig.11 is a diagram illustrating an example process 1100, performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 1100 is an example in which a base station (eg, base station 110, etc.) performs operations associated with supporting modified downlink control information for low-end user equipment.

[0131] like Fig.11As shown in , in some aspects, process 1100 may include transmitting an indication of a modified PDCCH configuration for a low-end UE (block 1110). For example, a base station (e.g., using transmit processor 220, controller / processor 240, memory 242, etc.) may transmit an indication of a modified PDCCH configuration for a low-end UE, as described above.

[0132] like Fig.11 As further shown in FIG. 1 , in some aspects, process 1100 may include transmitting DCI configured according to the modified PDCCH configuration (block 1120). For example, the base station may transmit (e.g., using transmit processor 220, controller / processor 240, memory 242, etc.) DCI configured according to the modified PDCCH configuration, as described above.

[0133] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0134] In a first aspect, an indication of a modified PDCCH configuration for low-end UEs is included in system information, a radio resource control message, or a combination thereof.

[0135] In a second aspect, alone or in combination with the first aspect, the indication of a modified PDCCH configuration for low-end UEs comprises an indication of whether to monitor legacy DCI or whether to monitor DCI having a reduced payload size compared to the legacy DCI.

[0136] In a third aspect, alone or in combination with one or more of the first and second aspects, the indication of a modified PDCCH configuration for low-end UEs comprises an indication of a DCI format of the DCI having a reduced payload size.

[0137] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, a DCI with a reduced payload size excludes one or more DCI fields included in a legacy DCI, one or more bits of one or more DCI fields included in a legacy DCI, or a combination thereof.

[0138] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, an indication of a modified PDCCH configuration for a low-end UE includes an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with a legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with the DCI (wherein one or more low priority bits of the DCI are mapped to one or more lower reliability locations compared to one or more high priority bits of the DCI).

[0139] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the second deinterleaving pattern or the second frozen bit repetition pattern is specific to at least one of a DCI format, a DCI payload size, or a radio network temporary identifier associated with the DCI.

[0140] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, the one or more low priority bits include at least one of reserved bits, padding bits, unused bits, bits mapped to a radio network temporary identifier, bits mapped to a search space set configuration, or a combination thereof.

[0141] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, a second deinterleaving pattern or a second frozen bit repetition pattern is indicated in a radio resource control message.

[0142] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, one or more values ​​corresponding to the one or more low priority bits are indicated in a system information or radio resource control message.

[0143] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, one or more values ​​corresponding to the one or more low priority bits are indicated based at least in part on a radio network temporary identifier, a search space set configuration, or a combination thereof.

[0144] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, an indication of a modified PDCCH configuration for a low-end UE includes an indication of whether to use a radio network temporary identifier (RNTI) having a first bit length to decode the DCI or to use an RNTI having a second bit length to decode the DCI, the first bit length being shorter than the second bit length.

[0145] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the first bit length is 16 bits and the second bit length is greater than 16 bits.

[0146] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the indication of a modified PDCCH configuration for low-end UEs comprises an indication of a second bit length.

[0147] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the indication of a modified PDCCH configuration for low-end UEs includes an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI.

[0148] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, if a cyclic redundancy check on the DCI using the first scrambling identifier is successful, the first scrambling identifier indicates a first value of a bit excluded from the DCI, and if a cyclic redundancy check on the DCI using the second scrambling identifier is successful, the second scrambling identifier indicates a second value of the bit.

[0149] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the indication of a modified PDCCH configuration for a low-end UE includes an indication of whether to use a linear scrambling scheme for the DCI or a demodulation reference signal (DMRS) associated with the DCI or to use a non-linear scrambling scheme for the DCI or the DMRS associated with the DCI.

[0150] although Fig.11 An example block diagram of process 1100 is shown, but in some aspects, process 1100 may include Fig.11 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1100. Additionally or alternatively, two or more blocks of the process 1100 may be executed in parallel.

[0151] The following provides an overview of various aspects of the disclosure:

[0152] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising: receiving an indication of a modified physical downlink control channel (PDCCH) configuration for a low-end UE; receiving downlink control information (DCI) configured according to the modified PDCCH configuration; and processing the DCI according to the modified PDCCH configuration.

[0153] Aspect 2: The method of aspect 1, wherein the indication of the modified PDCCH configuration for the low-end UE is included in system information, a radio resource control message, or a combination thereof.

[0154] Aspect 3: The method of any of the preceding aspects, wherein the indication of the modified PDCCH configuration for the low-end UEs comprises an indication of whether to monitor legacy DCI or whether to monitor DCI having a reduced payload size compared to the legacy DCI.

[0155] Aspect 4: The method of aspect 3, wherein the indication of the modified PDCCH configuration for the low-end UE comprises an indication of a DCI format of the DCI with a reduced payload size.

[0156] Aspect 5: The method of any of Aspects 3 or 4, wherein the DCI with a reduced payload size excludes one or more DCI fields included in the legacy DCI, one or more bits of one or more DCI fields included in the legacy DCI, or a combination thereof.

[0157] Aspect 6: A method as in any of the preceding aspects, wherein the indication of a modified PDCCH configuration for a low-end UE comprises an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with a legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with the DCI (wherein one or more low priority bits of the DCI are mapped to one or more lower reliability positions compared to one or more high priority bits of the DCI).

[0158] Aspect 7: The method of aspect 6, wherein the second deinterleaving pattern or the second frozen bit repetition pattern is specific to at least one of a DCI format, a DCI payload size, or a radio network temporary identifier associated with the DCI.

[0159] Aspect 8: A method as in any of Aspects 6 or 7, wherein: the one or more low priority bits include at least one of reserved bits, padding bits, unused bits, bits mapped to a radio network temporary identifier, bits mapped to a search space set configuration, or a combination thereof.

[0160] Aspect 9: The method according to any one of aspects 6-8, wherein the second deinterleaving pattern or the second frozen bit repetition pattern is indicated in a radio resource control message.

[0161] Aspect 10: The method of any one of aspects 6-9, wherein one or more values ​​corresponding to the one or more low priority bits are indicated in a system information or radio resource control message.

[0162] Aspect 11: The method of any of aspects 6-10, wherein the one or more values ​​corresponding to the one or more low priority bits are determined based at least in part on a radio network temporary identifier, a search space set configuration, or a combination thereof.

[0163] Aspect 12: A method as in any of the preceding aspects, wherein the indication of the modified PDCCH configuration for the low-end UE comprises an indication of whether to use a radio network temporary identifier (RNTI) having a first bit length to decode the DCI or to use an RNTI having a second bit length to decode the DCI, wherein the first bit length is shorter than the second bit length.

[0164] Aspect 13: A method as in Aspect 12, wherein the first bit length is 16 bits, and the second bit length is greater than 16 bits.

[0165] Aspect 14: The method of any one of aspects 12 or 13, wherein: the indication of the modified PDCCH configuration for the low-end UE comprises an indication of a second bit length.

[0166] Aspect 15: The method of any of the preceding aspects, wherein the indication of the modified PDCCH configuration for the low-end UE comprises an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI.

[0167] Aspect 16: A method as in Aspect 15, wherein if a cyclic redundancy check on the DCI using a first scrambling identifier succeeds, the first scrambling identifier indicates a first value of a bit excluded from the DCI, and wherein if a cyclic redundancy check on the DCI using a second scrambling identifier succeeds, the second scrambling identifier indicates a second value of the bit.

[0168] Aspect 17: A method as in any of the preceding aspects, wherein the indication of the modified PDCCH configuration for the low-end UE includes an indication of whether to use a linear scrambling scheme for the DCI or a demodulation reference signal (DMRS) associated with the DCI or to use a non-linear scrambling scheme for the DCI or the DMRS associated with the DCI.

[0169] Aspect 18: The method of any of the preceding aspects, wherein the UE is a low-end UE or a high-end UE utilizing a modified PDCCH configuration.

[0170] Aspect 19: A wireless communication method performed by a base station, comprising: transmitting an indication of a modified physical downlink control channel (PDCCH) configuration for a low-end user equipment (UE); and transmitting downlink control information (DCI) configured according to the modified PDCCH configuration.

[0171] Aspect 20: The method of aspect 19, wherein the indication of the modified PDCCH configuration for the low-end UE is included in system information, a radio resource control message, or a combination thereof.

[0172] Aspect 21: The method of any of aspects 19 or 20, wherein the indication of the modified PDCCH configuration for the low-end UE comprises an indication of whether to monitor legacy DCI or whether to monitor DCI having a reduced payload size compared to the legacy DCI.

[0173] Aspect 22: The method of aspect 21, wherein the indication of the modified PDCCH configuration for the low-end UE comprises an indication of a DCI format of the DCI with a reduced payload size.

[0174] Aspect 23: The method of any of Aspects 21 or 22, wherein the DCI with a reduced payload size excludes one or more DCI fields included in the legacy DCI, one or more bits of one or more DCI fields included in the legacy DCI, or a combination thereof.

[0175] Aspect 24: A method as in any of Aspects 19-23, wherein the indication of the modified PDCCH configuration for the low-end UE includes an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with the legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with the DCI (wherein one or more low priority bits of the DCI are mapped to one or more lower reliability positions compared to one or more high priority bits of the DCI).

[0176] Aspect 25: The method of aspect 24, wherein the second deinterleaving pattern or the second frozen bit repetition pattern is specific to at least one of a DCI format, a DCI payload size, or a radio network temporary identifier associated with the DCI.

[0177] Aspect 26: A method as in any of Aspects 24 or 25, wherein the one or more low priority bits include at least one of reserved bits, padding bits, unused bits, bits mapped to a radio network temporary identifier, bits mapped to a search space set configuration, or a combination thereof.

[0178] Aspect 27: The method of any one of aspects 24-26, wherein the second deinterleaving pattern or the second frozen bit repetition pattern is indicated in a radio resource control message.

[0179] Aspect 28: The method of any one of aspects 24-27, wherein one or more values ​​corresponding to the one or more low priority bits are indicated in a system information or radio resource control message.

[0180] Aspect 29: The method of any of aspects 24-28, wherein the one or more values ​​corresponding to the one or more low priority bits are indicated based at least in part on a radio network temporary identifier, a search space set configuration, or a combination thereof.

[0181] Aspect 30: A method as in any of Aspects 19-29, wherein the indication of the modified PDCCH configuration for the low-end UE includes an indication of whether to use a radio network temporary identifier (RNTI) having a first bit length to decode the DCI or to use an RNTI having a second bit length to decode the DCI, wherein the first bit length is shorter than the second bit length.

[0182] Aspect 31: A method as in Aspect 30, wherein the first bit length is 16 bits and the second bit length is greater than 16 bits.

[0183] Aspect 32: The method of any one of aspects 30 or 31, wherein the indication of the modified PDCCH configuration for the low-end UE comprises an indication of a second bit length.

[0184] Aspect 33: The method of any of aspects 19-32, wherein the indication of the modified PDCCH configuration for the low-end UE comprises an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI.

[0185] Aspect 34: A method as in Aspect 33, wherein if a cyclic redundancy check on the DCI using a first scrambling identifier succeeds, the first scrambling identifier indicates a first value of a bit excluded from the DCI, and wherein if a cyclic redundancy check on the DCI using a second scrambling identifier succeeds, the second scrambling identifier indicates a second value of the bit.

[0186] Aspect 35: A method as in any of Aspects 19-34, wherein the indication of the modified PDCCH configuration for the low-end UE includes an indication of whether to use a linear scrambling scheme for the DCI or a demodulation reference signal (DMRS) associated with the DCI or to use a non-linear scrambling scheme for the DCI or the DMRS associated with the DCI.

[0187] Aspect 36: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as in one or more of Aspects 1-18.

[0188] Aspect 37: A device for wireless communication, comprising: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more aspects of aspects 1-18.

[0189] Aspect 38: An apparatus for wireless communication, comprising: at least one device for performing the method of one or more aspects of aspects 1-18.

[0190] Aspect 39: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-18.

[0191] Aspect 40: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 1-18.

[0192] Aspect 41: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as in one or more aspects of Aspects 19-35.

[0193] Aspect 42: An apparatus for wireless communication, comprising: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more aspects of aspects 19-35.

[0194] Aspect 43: An apparatus for wireless communication, comprising: at least one device for performing the method of one or more aspects of Aspects 19-35.

[0195] Aspect 44: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 19-35.

[0196] Aspect 45: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method as in one or more of aspects 19-35.

[0197] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0198] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description language or other terms. As used herein, processors are implemented with hardware, and / or a combination of hardware and software. It will be obvious that the systems and / or methods described herein can be implemented in different forms of hardware, and / or a combination of hardware and software. The actual dedicated control hardware or software code for implementing these systems and / or methods does not limit various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes--it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0199] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0200] It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit the various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes-it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0201] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. The phrase quoting "at least one of" a column of items refers to any combination of these items, including a single member. As an example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc, and abc, and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other sorting of a, b and c).

[0202] Elements, actions or instructions used herein should not be interpreted as critical or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, combinations of related and non-related items, etc.), and can be used interchangeably with "one or more". In the case of intending to have only one item, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including", etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated.

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: receiving an indication of a modified physical downlink control channel (PDCCH) configuration for enhanced coverage; receiving downlink control information (DCI) configured according to the modified PDCCH configuration; as well as processing the DCI according to the modified PDCCH configuration, wherein the indication of the modified PDCCH configuration for enhanced coverage comprises at least one of: an indication of whether to monitor for DCI having a reduced payload size compared to a legacy DCI, the DCI having the reduced payload size excluding one or more DCI fields included in the legacy DCI, one or more bits of one or more DCI fields included in the legacy DCI, or a combination thereof, an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with a legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with the DCI, in which at least one of the second deinterleaving mode or the second frozen bit repetition mode one or more low priority bits of the DCI are mapped to one or more lower reliability locations compared to one or more high priority bits of the DCI, one or more values ​​corresponding to the one or more low priority bits being indicated in a system information or radio resource control message, or An indication of whether to use a first radio network temporary identifier (RNTI) having a first bit length to decode the DCI or to use a second RNTI having a second bit length to decode the DCI, the second bit length being longer than the first bit length.

2. The method of claim 1, wherein the indication of the modified PDCCH configuration for enhanced coverage is included in system information, a radio resource control message, or a combination thereof.

3. The method of claim 1, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of a DCI format of the DCI having the reduced payload size.

4. The method of claim 1, wherein at least one of the second deinterleaving pattern or the second frozen bit repetition pattern is specific to at least one of a DCI format, a DCI payload size, or a radio network temporary identifier associated with the DCI.

5. The method of claim 1, wherein the one or more low priority bits include at least one of reserved bits, padding bits, unused bits, bits mapped to a radio network temporary identifier, bits mapped to a search space set configuration, or a combination thereof. 6 . The method of claim 1 , wherein at least one of the second deinterleaving pattern or the second frozen bit repetition pattern is indicated in a radio resource control message.

7. The method of claim 1, wherein one or more values ​​corresponding to the one or more low priority bits are determined based at least in part on a radio network temporary identifier, a search space set configuration, or a combination thereof.

8. The method of claim 1, wherein the first bit length is 16 bits and the second bit length is greater than 16 bits.

9. The method of claim 1, wherein the indication of the modified PDCCH configuration for enhanced coverage comprises an indication of the second bit length.

10. The method of claim 1, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI.

11. The method of claim 10, wherein if a cyclic redundancy check on the DCI using a first scrambling identifier succeeds, the first scrambling identifier indicates a first value of a bit excluded from the DCI, and wherein if a cyclic redundancy check on the DCI using a second scrambling identifier succeeds, the second scrambling identifier indicates a second value of the bit.

12. The method of claim 1, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of whether to use a linear scrambling scheme for the DCI or a demodulation reference signal (DMRS) associated with the DCI or to use a non-linear scrambling scheme for the DCI or the DMRS associated with the DCI.

13. The method of claim 1, wherein the UE is a low-end UE or a high-end UE that utilizes the modified PDCCH configuration.

14. A wireless communication method performed by a network node, comprising: transmitting an indication of a modified physical downlink control channel (PDCCH) configuration for enhanced coverage; as well as transmitting downlink control information (DCI) configured according to the modified PDCCH configuration, wherein the indication of the modified PDCCH configuration for enhanced coverage comprises at least one of: an indication of whether to monitor for DCI having a reduced payload size compared to a legacy DCI, the DCI having the reduced payload size excluding one or more DCI fields included in the legacy DCI, one or more bits of one or more DCI fields included in the legacy DCI, or a combination thereof, an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with a legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with the DCI, in which at least one of the second deinterleaving mode or the second frozen bit repetition mode one or more low priority bits of the DCI are mapped to one or more lower reliability locations compared to one or more high priority bits of the DCI, one or more values ​​corresponding to the one or more low priority bits being indicated in a system information or radio resource control message, or An indication of whether to use a first radio network temporary identifier (RNTI) having a first bit length to decode the DCI or to use a second RNTI having a second bit length to decode the DCI, the second bit length being longer than the first bit length.

15. The method of claim 14, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI.

16. The method of claim 14, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of whether to use a linear scrambling scheme for the DCI or a demodulation reference signal (DMRS) associated with the DCI or to use a non-linear scrambling scheme for the DCI or the DMRS associated with the DCI.

17. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the memory comprising instructions executable by the one or more processors to cause the UE to: receiving an indication of a modified physical downlink control channel (PDCCH) configuration for enhanced coverage; receiving downlink control information (DCI) configured according to the modified PDCCH configuration; as well as processing the DCI according to the modified PDCCH configuration, wherein the indication of the modified PDCCH configuration for enhanced coverage comprises at least one of: an indication of whether to monitor for DCI having a reduced payload size compared to a legacy DCI, the DCI having the reduced payload size excluding one or more DCI fields included in the legacy DCI, one or more bits of one or more DCI fields included in the legacy DCI, or a combination thereof, an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with a legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with the DCI, in which at least one of the second deinterleaving mode or the second frozen bit repetition mode one or more low priority bits of the DCI are mapped to one or more lower reliability locations compared to one or more high priority bits of the DCI, one or more values ​​corresponding to the one or more low priority bits being indicated in a system information or radio resource control message, or An indication of whether to use a first radio network temporary identifier (RNTI) having a first bit length to decode the DCI or to use a second RNTI having a second bit length to decode the DCI, the second bit length being longer than the first bit length.

18. The UE of claim 17, wherein the indication of the modified PDCCH configuration for enhanced coverage is included in system information, a radio resource control message, or a combination thereof.

19. The UE of claim 17, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of a DCI format of the DCI having the reduced payload size.

20. The UE of claim 17, wherein at least one of the second deinterleaving pattern or the second frozen bit repetition pattern is specific to at least one of a DCI format, a DCI payload size, or a radio network temporary identifier associated with the DCI.

21. The UE of claim 17, wherein the one or more low priority bits include at least one of reserved bits, padding bits, unused bits, bits mapped to a radio network temporary identifier, bits mapped to a search space set configuration, or a combination thereof.

22. The UE of claim 17, wherein at least one of the second deinterleaving pattern or the second frozen bit repetition pattern is indicated in a radio resource control message.

23. The UE of claim 17, wherein one or more values ​​corresponding to the one or more low priority bits are determined based at least in part on a radio network temporary identifier, a search space set configuration, or a combination thereof.

24. The UE of claim 17, wherein the first bit length is 16 bits, and the second bit length is greater than 16 bits.

25. The UE of claim 17, wherein the indication of the modified PDCCH configuration for enhanced coverage comprises an indication of the second bit length.

26. The UE of claim 17, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI.

27. The UE of claim 26, wherein if a cyclic redundancy check on the DCI using a first scrambling identifier succeeds, the first scrambling identifier indicates a first value of a bit excluded from the DCI, and wherein if a cyclic redundancy check on the DCI using a second scrambling identifier succeeds, the second scrambling identifier indicates a second value of the bit.

28. The UE of claim 17, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of whether to use a linear scrambling scheme for the DCI or a demodulation reference signal (DMRS) associated with the DCI or to use a non-linear scrambling scheme for the DCI or the DMRS associated with the DCI.

29. The UE of claim 17, wherein the UE is a low-end UE or a high-end UE that utilizes the modified PDCCH configuration.

30. A network node for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the memory comprising instructions executable by the one or more processors to cause the network node to: transmitting an indication of a modified physical downlink control channel (PDCCH) configuration for enhanced coverage; and transmitting downlink control information (DCI) configured according to the modified PDCCH configuration, wherein the indication of the modified PDCCH configuration for enhanced coverage comprises at least one of: an indication of whether to monitor for DCI having a reduced payload size compared to a legacy DCI, the DCI having the reduced payload size excluding one or more DCI fields included in the legacy DCI, one or more bits of one or more DCI fields included in the legacy DCI, or a combination thereof, an indication of whether to use at least one of a first deinterleaving mode or a first frozen bit repetition mode associated with a legacy DCI or at least one of a second deinterleaving mode or a second frozen bit repetition mode associated with the DCI, in which at least one of the second deinterleaving mode or the second frozen bit repetition mode one or more low priority bits of the DCI are mapped to one or more lower reliability locations compared to one or more high priority bits of the DCI, one or more values ​​corresponding to the one or more low priority bits being indicated in a system information or radio resource control message, or Those An indication of whether to use a first radio network temporary identifier (RNTI) having a first bit length to decode the DCI or to use a second RNTI having a second bit length to decode the DCI, the second bit length being longer than the first bit length.

31. The network node of claim 30, wherein the indication of the modified PDCCH configuration for enhanced coverage further comprises an indication of whether to test multiple scrambling identifiers when processing the DCI or a demodulation reference signal associated with the DCI.

32. A network node as described in claim 30, wherein the indication of the modified PDCCH configuration for enhanced coverage further includes an indication of whether to use a linear scrambling scheme for the DCI or a demodulation reference signal (DMRS) associated with the DCI or to use a non-linear scrambling scheme for the DCI or the DMRS associated with the DCI.

Images